Dispensing apparatus



Oct. 14, 1930.

E. HURLBRINK ET AL DISPENSING APPARATUS Filed June 22, 1928 2 Sheets-Sheet 1 D MM Oct. 14, 1930. HURLBRmK ET AL DI SPENS ING APPARATUS 2 Sh eets-Sheet 2 Filed June 22, 1928 I i I E 1 H 7 7//////////////l////I// 7/74/ ////7 7//// a 81 ll Invenfom Hum. B R lN/r flliorneya -Patented Oct. 14, 1930 UNITED STATES PATENT OFFICE ERNST HURLBRINK, OF BERLIN, AND GEORG MEISTER, 0F BERLIN-BLANKENBURG, GERMANY, ASSIGNORS T0 FABRIK EXPLOSIONSSIGHERER GEFASSE SALZKOT'IEN G. M. B. H., OF SALZKOTTEN, GERMANY, A CORPORATION OF GERMANY DISPENSING APPARATUS Application filed J'une22, 1928, Serial No. 287,579, and in Germany July 1, 1927.

Our invention relates to improvements in dispensing apparatus, and more particularly in dispensing apparatus comprising a measuring receptacle, means for supplying the liquid thereto, and a pipe for removing the air or gas from the liquid supplied to the said receptacle. In apparatus of this type throttling means have been provided for arresting the supply of liquid after filling the receptacle and tor'indicating to the attendant that the receptacle has'been properly filled. In constructions now in use the area of the vent through which the air is removed from the receptacle must be comparatively small, in order to avoid the loss caused by the continued supply of liquid after'filling of. the receptacle has taken place. However, if the said area is small the resistance opposed to the air escaping through the vent when filling the receptacleis high, so that filling is made difiicult and takes much time. Further, when delivering the liquid from the measuring receptacle the air flows through the-vent into the receptacle only slowly,so that a vacuum is produced within .the receptacle which interferes with a rapid discharge of the measured liquid. 1

One of the objectsv ofthis improvements is to provide an apparatus in which the resistance opposed to. the. air [when r filling the receptacle or delivering the liquid therefrom is reduced, so that the filling and the discharging of the liquid is accelerated, and in which notwithstanding the rapid flow of the liquid the supply of an excess of liquid is prevented, and with this object in View our invention consists in providing a comparatively large discharge opening for the air, and

- providing the same with means for reducing the cross-sectional area of the said discharge when thereceptacle has been nearly filled.

I For this purpose a valve is provided in conthe top part of the measuring receptacle; after the receptacle has been filled or partly filled, the valve is automatically thrown into operation for reducing the area of the vent, so that only a small amount of the liquid can escape through the same. Further, the pressure within the receptacle is increased, so that the power needed for operating the filling apparatus is increased and the attention of the attendant is accordingly called to the fact that the receptacle has been filled. When discharging the liquid from the receptacle, the valve is automatically unseated, so that the air has an unimpeded access to the receptacle, and a rapid discharge of the liquid is insured.

Other objects of the invention will appear from the following description.

For thepurpose of explaining the invention several examples embodying the same have been shown in the accompanying draw,-

ings, in which the same reference characters have been used in all the views to indicate corresponding parts. In said drawings,

Fig. 1, is a diagrammatical sectional elevation showing the filling mechanism, the measuring receptacle, and the pipe through which the air is discharged from the measuring receptacle, f

- F ig. 2, is a sectional elevation on an en- ,larged scale showing the top part of the meas- .ing a modification,

Fig. 4, is a diagrammatical sectional elevation similar to, the one illustrated in Fig. 1 and showing amodification, and

Figs. 5 and 6, are sectional elevations on an enlarged scale and similar to those shown in Figs. 2 and 3, and showing modifications of the apparatus controlling the escape of the air.

In the example shown in Fig. 1 the dispensing apparatus comprises a cylindrical measuring receptacle 2 having a concentric top part 1 reduced in diameter, a hand operated pump 3 for supplying the liquid to the filling receptacle 2, pipes 4, 4 connecting the receptacle 2 is readilyfilled. When the level pump 3 with the bottom part of the receptacle 2, a discharge pipe 6 for delivering the liquid from the receptacle 2, a two-way cock adapted to connect the pipes 4, 4 or the pipes 45 and 6, and'a pipe .7 disposed concentrically within the receptacle 2 .and'ending within the portion 1 thereof. The apparatus shown in Fig.1. is used for example for supplying liquid fuel. The pipe 7 is connected with the e'inknom which the liquid is taken, and any excess of liquid supplied to the escapes through the pipe 7.

In the construction shown in receptacle 2 2the pipe 7 is provided at a point slightly below its top face 8 with an annular valve seat 9, and on the said seatthere is locatedan annular separating' disk 10 having a comparatively large concentric opening 11 and a small passage12. The'opening 11 is adapted to be closed by a valve 13 the stem of which is guided in a fr'ame l li depending from the disk 10, said valve' l'i-i beingjnormallyheld away from its ea-byai pri operation of the apparatus is as follfOws; When supplying the liquidthrough the pipes 1, 1? to'the receptacle 2 the air can rapidly escape from the receptacle through the largefo pening 11 and the small passage 12 of the disk .10, so that the resistanceopposed to theincoming of the liquid is small, and the of the liquid rises above the top face 8' of the pipe7 the liquid acts. on the jvalve' 13 and presses thesame on the disk 10 against the pressure of the spring 15,: so that the open- 'ing 11 isclosed, At this stage theinner part of the receptacle communicates with the pipe 7 only through the small passage 12, so that only aysmall amount of liquid together with the air or gas which may have collected above the top'8 oithe'pi'pe'7escapes fromtherecep iac r the liquidis rapidly discharg d;

Inj theconstruction shownfin Fig- 2 the disk 10' also constitutes 'a check valve f and 7 permits the airto flow-back into the receptacle 2." Therefore'the'discharge of the liquid from the, receptacle is not retarded even though the area o f the-"opening' 11 and the passage 12 is nolarger'th'an is necessary for the expulsion ofthe air when filling the receptacle. "Preferably thearea of the said opening and passages 11,112 is {of the smallest dimensions ne'eded for this purpose, because otherwise the 16 is provided in its bottom with a series of concentrically arranged passages 17 connecting the receptacle 1 with the interior of the hood 16 and the pipe 7. The top of the bushing 19 provides a support for an annular valve disk- 20 whichis guided on-the nipple 18, and includesa single passage 21 located in registry with one of the passages 17. The disk 20 is made from light material, so that it mav easily be lifted by the liquid rising within the receptacle-1 intoposition for clos-v i'ng allthe passages 17 except the one located in registry with the passage 21'. p

The operation oi the'apparatus is as follows: Theliouid rising wi-thin the receptacle 2 drives the air throughthe passage 17 and into the" pipe 7. When the receptacle has been filled the valve disk 20 is lifted by the liquid into position to close allof the passages'l'? except one so that a material loss of liquid is prevented, and. the pressure within the receptacle 2fisincreasedthus indicating to the attendant that, the receptacle has been filled. Any excess of liquid supplied'to the receptacle overflows through the passages 21, 17 and the pipe 7 to the tank. I YVhen delivering theliouid'from the receptacle 2, the valve disk 20 immediately drops to "the top face oithe bushing 19, so that all'the passages 17 [are laid open, and the air has free'acc'e'ss from the pipe 7 into the measuring receptacle 2. Thus a vacuum *which would interfere with the rapid dispensin-g operation cannot be produced. Also in this construction the measuring receptacle is rapidly filledandemptied, and yet there are throttling means operative at'the end of the filling operation having the'results stated'above. j i i 7 In: Figs; AL to 6 we have shown modifications whichtheupper part of the pipe 23 through which the air is removed from the receptacle 1, 2is'icovered bv a hood 22'which is'closed at its top'and ooen at its bottom 38, an' annular passage 27 being provided between the saidhood the upper part of the pipe 23. Near its'top the hood isformed with a transverse partition comprising a downwardly directed nipple 24c screwing into .abushing25 whichis fittedinto the upperend of the pipe 23,:said partition carrying the nipple 245 being provided with a concentri- "'cally arranged serieso-f passages 26 establishing communication between the 1 annular theupper end 29 of'the b'ushing 25an annular valve disk 28 issupported, which is guided on the nipple 24 and is provided with a single passage 30 corresponding in position to one of the passages 26. When raised away from the bushing 25 the disk 28 closes all the passa es 26 except the one corresponding in position to the passage 30. In practice the passage is very narrow, so that it permits only the passage of a very small amount of air, the flow of the air being so slow that any escape of liquid from the receptacle 1 into the pipe 23 is prevented. As a matter of fact the passage 30 merely functions to permit a restricted escape of air.

In the construction shown in Fig. 5 a vent 31 is provided at the upper part of the hood 22 and above the passages 26, the said vent connecting the receptacle 1, 2 with the interior of the hood and the pipe 23. At the level of the passage 31 a mark 32 is applied to the outer face of the upper position 1 of the receptacle 2. the said mark indicating level of the contents of the receptacle when the latter is filled to the desired extent.

In the modification shown in Fig. 6 the vent 31 connecting the receptacle 2 with the pipe 23 is located below the artition containing the passages 26 and communicates with the annular passage 27 of the hood 22.

The operation of the apparatus shown in Figs. 4 and 5 is as follows: When forcing the liquid by means of the pump 3 into the receptacle 2 the air escapes through the annular passage 27, the passages 26 and the pipe 23. When the liquid has risen to the bottom 33 of the hood 22. it rapidly rises within the annular passage 27, and finally it lifts the valve ring 28 so as to close the passages 26 except the one which re isters with the passage 30. 3 At this stage the sup lv of li uid is accordingly almost entirely interrupted.

The air confined outside the hood 22 within the top 1 of the receptacle can escape only at V a slow rate throu h the passage 31, so that if the operation of the pum 3 is continued the level of the liquid rises within the top part 1 and the air above the same slowly escapes through the passage 31. The higher the pressure of the pump, the sooner the top V 1 is filled with liquid.

While the supply of liquid is thus retarded until the receptacle is filled to the mark 32, any gas or air contained within the liquid is separated therefrom, and escapes through thepassage 30 and the passage 26 which registers therewith. When the liquid has risen to the'mark 32, the whole receptacle is filled Iwith liquid which is free of air or gas bubles.

By reason of its concentric arrangement the part 1 of the receptacle can be made of relatively small diameter. Therefore errors inmeasurement caused by the difference of the levels between the measuring plane and the throttling element is reduced to a minimum.

In the modification shown in Fig. 6 the air confined within the hood before the end of the filling operation cannot escape directly to the pipe 23 but must first flow through the passage 31 into the annular passage 27, from which it flows into the pipe 23. Since there is the same pressure in the annular passage 27 and within the hood 1, independently of the pressure of the pump supplying liquid to the receptacle 2, the liquid rises within the hood to the indicating mark 32 exclusively by the action of the difference of pressure caused by the difference of level be tween the surface of the liquid within the hood 1 and the surface of the liquid within the passage 27 rising to the throttling part 26. Therefore, even if strong pressure is exerted by the pump for completing the filling, the level of the liquid rising within the hood 1 will only slowly come to the measuring level 32. As a result of this, bubbles will be completely separated, and the rising of the liquid can be safely observed.

The liquid supplied to the receptacle .2 after closing the passage 26 within the hood 22 for completing the filling of the receptacle is taken exclusively from the downwardly directed branch of the pipe 4 which is'likewise free from gas bubbles by reason of the slow movement of the liquid therethrough, the gas being collected at the top of the said pipe. Since the capacity of the downwardly directed branch of the pipe 4 is at least equal to the amount of liquid needed for completing the filling, no new air or gas bubbles enter the receptacle 2 when filling the hood 1 and the part of the receptacle 2 relieved from the gas.

lVhen discharging the liquid from the receptacle 2 through the pipe 6 the valve ring 28 drops o'n the top part 29 of the bushing 25, so that the air has free access to the upper part of the receptacle 2 through the whole series of passages 26.

Our improved system can be used in connection withdispensing systems comprising a single measuring receptacle, as well as in systems comprising a double measuring receptacle.

lVhile in describing the invention reference has been made to particular examples embodying the same we wish it to be understood that our invention is not limited to the constructions shown in the drawings, and that various changes may be made in the general arrangement of the apparatus and the construction of its parts without departing from the invention.

We claim:

1. An apparatus for dispensing liquids in measured quantities, comprising a measuring receptacle having a supply and a discharge for the liquid. and means for discharging air or gas from said receptacle, said means comprising an opening of predetermined area and means controlled by the liquid rising within the receptacle for reducing the area of the said opening. 7

2. An apparatusfordispensing liquids in measured quantities, comprising a measur- V ing receptacle having a supply and a discharge for the liquid, and means for discharging air or gas from said receptacle, said means comprising an opening of predetermined area and a check valve constructed to partly close said opening and arranged to'be set into opening position by a current I of airflowing through said opening into the receptacle. 7 v n 3, An apparatus for dispensing liquids in measured quantities, comprising a measuring receptacle having a supply and a dis chargefor the liquid, a pipe extending upwardly within said receptacle, a. hood cover ingthe upper portion of said pipe and com; municating through a. passage with the pipe, and means withinsaid hood adaptedto beacted upon bythe liquid rising within the I hood for reducing the area of said passage, said hood being formed withva vent through which the space located between the hood and the wall of the receptacle communicates with the pipe.

4. An apparatus for dispensing liquids in measuredquantities, comprising a measuring receptacle having a supply and a discharge for the liquid, a pipe extending upwardly within said receptacle, a hood covering the upper portion of said pipe and com.-

' municating througha passage with the pipe,

and means within said hood adapted to be actedupon by the liquid rising within the hood for reducing thejarea of said passage, said hood being formed near ,its top and below said vent with afipassage through which the space located between. the hood and the wall of the receptacle communicates withthe pipe. 1 V i In testimony whereof, we have signed this 4F specification. v

a .ERNST HURLBRINK.

GEORG '.MEISTER. 

